nikon canon mount HELP (cant take off)

[matt_m__toronto_]

<p>i just got one of those chinese adapters off the bay site, and i don't see any push tab or anything to take the adapter off the lens...i can't recall if the adapter *clicked into place. any suggestions?</p>

<p>thanks<br>

matt</p>

[sarah_fox]

<p>There's a tiny tab on the flange (that might look like part of the flange). You have to push it away from the lens with your thumbnail (in the direction of the back of the camera if the lens were mounted). You might have to wiggle it a bit. Mine doesn't move very smoothly.</p>

[matt_m__toronto_]

<p>thank you very much sarah! such a simple thing, wish the little box came with some instruction for this. i owe you a beer</p>

[sarah_fox]

<p>De nada. Happy to help! :-)</p>

[JDMvW]

<p>I've found it's usually easier to dismount the adapter <em>from the lens</em> , rather than from the Canon body, FWIW.</p>

<p>If you think this is hard to figure out how to remove, wait until you encounter a Contax/Yashica or Exakta adapter. However, part of the joy of being a Canon owner is the incredible range of lenses that can be used on these bodies. I have never seen instructions with <em>any</em> of these X>EOS adapters, so it's a good idea to look carefully at them before mounting them on the lens or body.</p>

[matt_m__toronto_]

<p>ok, it seems my nikon 20mm 2.8 lens will not fit on this camera. part of the (flange?) sticks out too much? i thought i saw a list of lenses that would not work, and i did not see this lens listed....</p>

[marlon_kuzmick]

<p>this site seems to say that the 20 f/2.8 is a no-go on the 5D (and 5D2)--is that your camera?</p>

<p><a href="http://www.cameraquest.com/frames/4saleReos.htm">http://www.cameraquest.com/frames/4saleReos.htm</a></p>

<p>I'd be interested to know--I'm using loads of cheap Nikons too, and I'm nervous about hitting the mirror. Was it pretty obvious to you that it wouldn't fit as you attached it? Or did it seem like a more careless photographer might have rammed it right into the mirror? :)</p>

<p>best,<br>

M</p>

[JDMvW]

<p>Yes, unless you have a "full-frame," 24x36mm sensor body, the 20mm should clear the mirror. But wait, is it an AI lens? some of those do have junk sticking back farther from the lens.<br>

My old Nikon lenses are all non-AI, and I have never encountered a problem, even on full-frame 35mm film EOS cameras. (They're cheaper to buy too, if a little less than state-of-the-art coatings and design in some cases.)</p>

[sarah_fox]

<p>If by "part of the (flange?)" you mean a "shield" that sticks out behind the rear element, that part can be harmlessly trimmed off with a sharp pair of kitchen shears. It's made of thin aluminum. Touch up the bare metal with a sharpie.</p>

[matt_m__toronto_]

<p>marlon, i did not jam the lens on :) it just looked like the 'shield' part would not fit. i have an old 24mm 2.8 lens that fits on , but it is not AIS as it has been AI'd later on . i read something about trimming the shield part of the lens. i'm assuming it will not affect performance when i go to put that lens back on my nikon film cam's?</p>

<p>and yes, i'm using a 5d2.</p>

<p>thanks for the info guys</p>

[sarah_fox]

<p>I was told by a Nikon photog that the shield is designed to allow the lens to sit on its backside without the rear element contacting the tabletop. I don't know if that's true, but that's what I've heard.</p>

<p>If you trim the shield so that it doesn't extend farther back than the backside of the adapter, your mirror clearance should be just fine.</p>

[JDMvW]

<p>Sarah: Sharpies™ are the duct tape of finish touch-up.;)<br>

Another, more permanent solution, but a little messier, may also be found in something called a "uniPaint™" pen. As it says, "opaque, oil-base paint marker" available in white, and many colors. Probably the Sharpie is better in this case.</p>

[sarah_fox]

<p>uniPaint... Thanks for the tip. I'll try to find some for those odd little jobs.</p>